Perhaps you should try some spelling variations:
cham trung » pham trung, pham truong, nam trung
cua triet » cua viet, su triet, va triet
phan lai » phan loai, phan lap, phan lan
trung va » truong va, trang va, trung ha
thu sach » tu sach, thuat sach, thuoc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va phan » van phan, va phat, va phap
ty nang » ky nang, ty hang, ly nang
lai cua » dai cua, hai cua, lai chau
hoc hoi » hoc khoi, hoc hoa, hoc noi
ho hoi » hoa hoi, hoi hoi, co hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) or (ty xang)) ((ho hoi) OR (hoc hoi)). hieu vu cham trung va phan lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) ((ho hoi) OR (hoc hoi)). hieu vu cham trung va phan lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) or (ty xang)) ((ho hoi) OR (hoc hoi)). hieu vu cham trung va phan lai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) ((ho hoi) OR (hoc hoi)). hieu vu cham trung va phan lai cua triet*.